ShaderToy - OpenGL GL/ES Programming

Shader Toy is one of several websites that allow you to code interactively wish GLSL ES Shaders, that run directly on the GPU in real time.

GLSL ES is very C Like but it's not C.  It's intended to run parallelized on the GPU.

https://www.shadertoy.com/browse




https://en.wikipedia.org/wiki/OpenGL_ES
OpenGL for Embedded Systems (OpenGL ES or GLES) is a subset^[2] of the OpenGL computer graphics rendering application programming interface (API) for rendering 2D and 3D computer graphics such as those used by video games, typically hardware-accelerated using a graphics processing unit (GPU). It is designed for embedded systems like smartphones, tablet computers, video game consoles and PDAs. OpenGL ES is the "most widely deployed 3D graphics API in history".^[3]

 Almost all rendering features of the transform and lighting stage, such as the specification of materials and light parameters formerly specified by the fixed-function API, are replaced by shaders written by the graphics programmer.



https://shadertoyunofficial.wordpress.com/

The principles of painting with maths  https://www.youtube.com/watch?v=0ifChJ0nJfM